Reinforcing-frame for concrete structures.



Nq. 889,223.- PATENT-EE JUNEz, .MJ-Vo..V

* C. M. CRAHAM. REINECRCINC FRAME ECR CONCRETE STRUCTURES.-

APPLIOATION FILED MAR. 9. 1908.

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UNITED sTATEs PATENT OEEICE.

GEOEGE M GRAHAM, OE CHICAGO, ILLINOIS, Ass-IGNCE Too. A. EDWARD KOHLEE, or

CHICAGO, ILLINOIS.

BEINFORCING-FRAME FOR CONCRETE STRUCTURES.

Specification of Letters Patent.

Patented Jane 2, 190s.

Applicationled March 9, 1908. lSerial No. 419,857.

' following is a specification. l This invention relates to that class of reinforced ooncrete structures in which the skeleton reinforcing frame comprises round tubular border members and a skeleton center and between said members under tension, as

.set forth in .detail in my prior patent No.

865,490 of September 10, 1907. And the present` improvement has for its object to the border frame members are connectedtogetlier in a simple and rigid manner, and added' rigidity imparted to suoli connection by the tension truss members forming parts of the border frame, all as will hereinafter more fully appear.

In the accompanying drawings z-Figure 1 is a detail perspective view of a corner portion of the reinforcing frame of aconcrete structure having the present improvements applied. Fig. 2, is a sectional plan view of same on line :1i- Fig. 3. Fig. 3, is asectional elevation of same, on line L- Fig. 2;

Fig. 4, is a similar view on line a02-x2 Fig. 2.

. Fig. 5,' is a detail perspective view of the 35 y portion of a vertical column, and 2 adjacent ends-of the round tubular girder members of a skeleton reinforcing frame of a .concretestructure as set forth in my -aforesaid patent No. 865,490, and the coupling together of which constitutes the subject matter of the present improvement and to such end comprises a formation and combination of parts as follows I' 3 and 4 are angle coupling pieces the members of which are arranged in right angle relation to each other and have a segmental or Vconcavo-convec .form in cross section so as to fit and have .extended bearing Contact with the rounded peripheries of the column and girder members aforesaid. Such Coupling members are provided with orificesf along their length for the assage of the hereinafter describedclampingliolts.

6 are the clamping bolts passing through the orifices 5 of the coupling'pieces, and entirely through the columns and girders to which. they are applied and clamping firmly the v.parts together. are additionally held in place by one or more` `wrappings 7 of the Wires or rods 8 which form Such coupling .pieces thetension members of the truss by lwhich the lateral rigidity is imparted tothe girders,

as fully set forth in 'my companion applica.- tion for Patent Serial No'. 419,856 filed Mar. 9, 1908, and as illustratedin Figs. 1 and 6.

In said construction the tension member S'eX- tends from one girder. end or column to 'an opposite girder end or column and has bearing against lateral strut's 9 as shown in Fig. 1. In the present construction pairs of suolil coupling pieces arranged on common horizontal planes will be used to attach the abutting ends of the horizontal girders 2 ,toavertical column 1, and with a view to prevent an interference between the clamping bolts above referred to, the orifices 5`in the coupling members which are attached to the column 1 will have a staggered or alternated relation to the Corresponding orifices Of the soy companion coupling members, and so that the y two sets of clamping bolts 6', having a right angle relation, may freely pass through the parts Without interfering with each other.

Having thus fully described my said invention what I claim as' new and desire to secure by Letters Patent, isz- .1.. In a skeleton reinforcing frame for concrete structures, the combination of avertical column, horizontal girders arranged in right angle relation to each other and abutting against said column, angle coupling j tical colunin, horizontal'girders arranged in right angle relation to each other and abutting against said column, angle 'coupling pieces the members of which are in right angle relation and have a conCavo-convex. form,

and a series of clamping bolts passing through said members and entirely through the eolumn and girders, one set of Clamping bolts having a staggered relation to its companion set.

3. -In a skeleton reinforcing frame for con- Crete structures, the combination of a vertical Column, horizontal girders arranged in right angle relation to each other andl abutting against said column, angle coupling pieces the members of which are in right an gle relationand have a concave-convex form, a series of clamping bolts passing through said members and entirely through the c olumn 4and girder, and a lateral truss for thel girder consisting of intermediate struts and Wire or 'rod tension membcrs extending from column to column, over said struts and Wrapped around the column and couplingpieces.

Signed at Chicago, Illinois this 29th day of GEORGE M. GRAHAM..

.February 1908.

Vitnesses ROBERT BURNS, HNRY MOE. 

